Electrochemical and optical studies of the band gaps of alternating polyfluorene copolymers

Artikel i vetenskaplig tidskrift, 2006

The electrochem. and optical properties of alternating polyfluorene copolymers with low band gaps were detd. These polymers incorporated fluorene units alternating with groups including electron-withdrawing (A) and electron-donating (D) groups in donor-acceptor-donor (DAD) sequence to achieve the lowering of band gaps. The polymers were solvent-casted on Pt disk electrode and the band gaps were estd. from cyclic voltammetry (CV). These values were compared with values obtained from optical absorption measurements. Although the electrochem. detd. band gaps are slightly higher than the optical band gap in most cases, values are well correlated. The values of the band gaps detd. range from 2.1 to 1.3 eV. [on SciFinder (R)]

electrochem. and optical studies of band gaps of alternating polyfluorene copolymers)

electrochem. and optical studies of band gaps of alternating polyfluorene copolymers)

Reduction potential

electrochem optical band gap polyfluorene

Band gap (electrochem.

Oxidation potential

Band gap (optical

Cyclic voltammetry

UV and visible spectra (electrochem. and optical studies of band gaps of alternating polyfluorene copolymers)